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A kind of high-strength super wear-resistant MC nylon composite material and preparation method thereof

A nylon composite material, super wear-resistant technology, applied in the field of polymer materials, can solve the problems of difficult to bear heavy loads, low strength and modulus of MC nylon, wear resistance and poor toughness, etc., to achieve the effect of improving self-lubrication

Active Publication Date: 2021-08-31
江苏利德尔新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] MC nylon, also known as monomer cast nylon or cast nylon, has excellent comprehensive properties such as good mechanical properties, wear resistance, weak acid and weak alkali resistance, organic solvent resistance, and direct casting molding. It can be used to manufacture various mechanical parts. In many In the field, it is gradually replacing various metal materials such as copper, aluminum, and steel. However, compared with metal materials, MC nylon has lower strength and modulus, poor wear resistance and toughness, and is difficult to withstand heavy loads, so its application is limited. scope

Method used

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  • A kind of high-strength super wear-resistant MC nylon composite material and preparation method thereof
  • A kind of high-strength super wear-resistant MC nylon composite material and preparation method thereof
  • A kind of high-strength super wear-resistant MC nylon composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh each raw and auxiliary material according to the following ingredients:

[0020]

Embodiment 2

[0022] Follow the steps below to produce:

[0023] (1) Put the above-mentioned 1 / 4 caprolactam monomer into melting pot A, raise the temperature to 125°C, set the pressure to normal pressure, and melt it;

[0024] (2) Sodium hydroxide is added into the melting material kettle A, and the molten raw material is vacuum dehydrated in a negative pressure dehydration system, and the dehydration temperature is set at 127° C., and the dehydration pressure is less than 5 mmHg;

[0025] (3) Add the Lekna gum into the melt kettle A, continue vacuum dehydration in the negative pressure dehydration system, set the dehydration temperature to 130°C, and the dehydration pressure to be less than 5mmHg;

[0026] (4) Start the nitrogen charging switch, transfer the raw materials in the melting tank A into the material storage tank of material A through the pressurized delivery pipeline for temporary storage, restore the normal pressure of the reactor, and keep the temperature of material A at 16...

Embodiment 3

[0032] The MC nylon composite material produced according to the above formula and the ordinary nylon sold in the market were tested for various properties. The test results are shown in Table 1:

[0033] Table 1

[0034]

[0035]

[0036] From the above table, it can be seen from formula 1-3 that the addition of polypotassium titanate nanoparticles improves the wear resistance and heat resistance of MC nylon, and the wear resistance and heat resistance of formula 3 reach the maximum; from formula 3 -6 It can be seen that the problem of poor toughness of MC nylon caused by polypotassium titanate nanoparticles is solved by adding maleic anhydride grafted EPDM rubber, and formula 3 has the strongest toughness enhancement. Therefore, the addition of polypotassium titanate nanoparticles is 2-10% of the mass of the caprolactam monomer, and the addition of maleic anhydride grafted EPDM rubber is 5-20% of the mass of the caprolactam monomer, preferably 8-20%. 13%.

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Abstract

The invention discloses a high-strength super wear-resistant MC nylon composite material and a preparation method thereof, which belong to the technical field of polymer materials. The technical scheme of the present invention is to add polypotassium titanate nanoparticles, maleic anhydride grafted EPDM rubber, and a coupling agent to the caprolactam monomer, and trigger the caprolactam through the sodium hydroxide-lechner gum catalytic activation system. Amide anionic ring-opening polymerization reaction, the reactant is cast into a preheated moisture mold under normal pressure to complete the polymerization and molding at the same time. The composite material obtained by the preparation method maintains the high strength of ordinary MC nylon, and at the same time further improves self-lubrication, anti-friction, wear resistance, toughness, heat resistance, and dimensional stability, and is especially suitable for the use requirements of elevator transmission parts.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-strength super wear-resistant MC nylon composite material and a preparation method thereof. Background technique [0002] MC nylon, also known as monomer cast nylon or cast nylon, has excellent comprehensive properties such as good mechanical properties, wear resistance, weak acid and alkali resistance, organic solvent resistance, and direct casting molding. It can be used to manufacture various mechanical parts. In the field, it is gradually replacing various metal materials such as copper, aluminum, and steel. However, compared with metal materials, MC nylon has lower strength and modulus, poor wear resistance and toughness, and is difficult to withstand heavy loads, so its application is limited. scope. In order to overcome the shortcomings of MC nylon and improve its performance, how to further improve its mechanical properties and develop its ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/02C08L51/04C08K7/08C08G69/16
CPCC08G69/16C08K2201/011C08L77/02C08L2201/08C08L51/04C08K7/08C08L51/003
Inventor 朱海霞沈国春邵自强胡国华张超
Owner 江苏利德尔新材料科技有限公司